Table 1.

Adapted from AAOS guidelines for elective surgery [5]

Category	A	B	C	D
Degree of emergency	Emergency	Urgent	Urgent/ Somewhat elective	Elective
Types of procedures (non-exhaustive selection)	Life- or limb-threatening conditions	Joint/arthroplasty infections Most trauma cases	Acute intra- and periarticular ligament & tendon conditions (e.g. ACL tears, meniscus bucket handle tears) Selected trauma cases	Total joint arthroplasty Osteotomies Chronic intra- and periarticular ligament & tendon conditions Chronic peripheral nerve compression syndromes